[?] Combine 3 figures together?

Questions
,
1

I want to combine those 3 figures together be this problem appear to me

plot = Show[
  LineIntegralConvolutionPlot[{{y, -y - 2 x - 2}, {"noise", 500, 
     500}}, {x, -3, -1}, {y, -4, 4},
   ColorFunction -> "Rainbow", LightingAngle -> 0, 
   LineIntegralConvolutionScale -> 3, Frame -> False],
  LineIntegralConvolutionPlot[{{y, -y}, {"noise", 500, 500}}, {x, -1, 
    1}, {y, -4, 4},
   ColorFunction -> "Rainbow", LightingAngle -> 0, 
   LineIntegralConvolutionScale -> 3, Frame -> False],
  LineIntegralConvolutionPlot[{{y, -y - 2 x + 2}, {"noise", 500, 
     500}}, {x, 1, 3}, {y, -4, 4},
   ColorFunction -> "Rainbow", LightingAngle -> 0, 
   LineIntegralConvolutionScale -> 3, Frame -> False],
  PlotRange -> {{-3, 3}, {-4, 4}}]]

Capture.PNG.jpg
Capture.PNG.jpg733×526 180 KB

2

There is one extra square bracket at the end. If it’s deleted, then:

Show[
LineIntegralConvolutionPlot[{{y, -y - 2 x - 2}, {"noise", 500, 500}}, {x, -3, -1}, {y, -4, 4}, ColorFunction -> "Rainbow", 
LightingAngle -> 0, LineIntegralConvolutionScale -> 3, Frame -> False],
LineIntegralConvolutionPlot[{{y, -y}, {"noise", 500, 500}}, {x, -1, 1}, {y, -4, 4}, ColorFunction -> "Rainbow", LightingAngle -> 0, LineIntegralConvolutionScale -> 3, Frame -> False], 
LineIntegralConvolutionPlot[{{y, -y - 2 x + 2}, {"noise", 500, 500}}, {x, 1, 3}, {y, -4, 4}, ColorFunction -> "Rainbow", 
LightingAngle -> 0, LineIntegralConvolutionScale -> 3, Frame -> False],
PlotRange -> {{-3, 3}, {-4, 4}}]

9083g.jpg
9083g.jpg360×360 40.5 KB

3

Thank you very much
but i want to combine this 3 figures in one figure and eliminate this discontinuity
this plot for continuous flow field but defined with different equation in each range

4

May be this piece of code is more appropriate:

Show[
LineIntegralConvolutionPlot[{Piecewise[{{{y, -y - 2 x - 2}, -4 <= x <= -1}, {{y, -y}, -1 <= x <= 1}, {{y, -y - 2 x + 2}, 1 <= x <= 4}}], {"noise", 500, 500}}, {x, -3, 3}, {y, -5, 5}, 
ColorFunction -> "Rainbow", LightingAngle -> 0, LineIntegralConvolutionScale -> 3, Frame -> False], PlotRange -> {{-3, 3}, {-5, 5}}]

10511g2.jpg
10511g2.jpg360×360 43.8 KB

5

thank you very much , this is really helpful